Just Friends?

Have you been through this? You get to know a guy...They start messaging you every night...They start calling you baby, darling, dear etc...They talk intimately with you...They keep on asking for your photos because they love to see you...And in the end they say you guys are just friends... Is that actually normal? I wonder if its just me, being easily swayed by simple affection, or it really is an act of insanity on their side...If that is friendship, I wonder how it'd be like with their loved ones...